Magnetic separator.



No. 823,285. PATENTED JUNE 12; 1906.

H. H. WAIT.

MAGNETIC SEPARATOR.

APPLICATION FILED MAR. 20. 1905.

2 SHEETS-SHEET 1.

W jgm izzzz PATENTED JUNE 12, 1906.

H. H.WAIT. MAGNETIC SEPARATOR.

APPLICATION FILED MAR. 20. 1905.

2 SHEETS-SHEET 2.

To all whom it may concern:

. UNITED STATES PATENT OFFICE.

HENRY H. WAIT, OF CHICAGO, ILLINOIS, ASSIGNOR TO INTERNATIONAL SEPARATORCOMPANY, .OF CHICAGO, ILLINOIS, A CORPORATION OF NEW, JERSEY.

' MAGNETIC sEeARAToR.

Specification of Letters Patent.

Patented June 12, 1906.

Applioationfiled March 20,1905, Serial No. 251,074

Be it known thatI, HENRY H. WAIT, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Magnetic Separators,of. which the following is a full, clear, concise,

and exact description.

My invention relates to a magnetic oreseparator, and has for its objectto rovide a simple machine requirmg very htt e energy for its operationin which the magneticallyattracted particleswill be effectivelyseparated from the non-magnetic material and will not be liable tomingle therewith after the initial separation has taken place.

The ore-separator of m invention may consist sim ly ofapassage etweenmagnetic surfaces, t ough which the material is assed, with means forproviding diagonal lines of magnetic concentration or magnetic rifliesacross the assage, adapted to divert the more permeab e particles, incombination with dividers located above the riifles in position toprevent the attracted particles which were diverted by one'rifile frombeingdrawn back again toward the path of the non-magnetic material inapproaching the succeeding rifile.

I will describe my invention particularly b reference to theaccompanying drawings, illiistrating the preferred embodiment thereof,and the parts, improvements, or combinations which I regard as novelwill be pointed out in the appended claims.

Figure 1 is a plan view of the ore-se arator.

Fig. 2 is a sectional elevation thereo on line in such a way as to forma working passage through which the material to be separated is passed.A feeding chute or hopper A is shown at the top, by which the materialmay be introduced into the working passage between the two ma'gnetpoles. Magnetlc particles under the influence of a magnet tend to movetoward-the densestv ortion of the field. In the ore-separator 1lustrated the working passage is'p'rovided with a series of magneticrifiles or lines, along which the magnetic density is increased, theseriffles or lines of magnetic concentration extending diagonally downwardacross the path ghlriough which the material to be separated a s.Preferably the magnetic riffles are provided by forming the opposingfaces of the magnet-poles as indicated in Fig. 4-that is to say, with aseries of rejections gradually sloping toward each ot er in a downwarddirection and ending in sharp edges, at which the magnetic flux will bemost highly concentrated. Asshown in Fig. 3, these sharp edges willextend across the poleieces in diagonal lines. The magnetic r' es willtherefore form what may be called an inclined hammock of magnetic 'linesof force, which will tend to arrest falling magnetic particles and causethem to follow for a short istance the diagonal course determined by thedirection of the riflie, so that in this way the magnetic particles willbe separated from the non-magnetic material falling straight down.

It will be noted that there is a increasing density of the magnetic fluxbetween the ridges on the pole-faces, this flux reaching a maximum atthe sharp lower ed es of such ridges. The magnetic materia leaving thelower edge of one of these ridges or riflies will therefore as itcontinues to fall be subjected to an increasin magnetic attractiontoward the next r e, and as the next rifile is diagonal the tendencywill be for the magnetic material to be deflected back again toward thepath of the non-magnetic particles. This action is, however, not asstrong as the deflecting action of the sharp edge of the rifiie. It isnevertheless cons1derable, and I therefore provide divider-plates P P,located between the paths of the magnetic and'non-magnetic material asit leaves each rifile, and extending downward to the edge of thesucceeding riifle, so as to prevent the attracted material from beingdrawn back again into the ,path of the nonattraoted material. In thedrawings the rifiles are shown at different distances apart and atdifferent angles of inclination, the ebgraduallyma fre ject being toproportion the magnetic action to the increase in velocity of thefalling particles.

'1. The combination with magnet-poles of opposite polarity facing eachother to constitutea working passage, of means for directing material tobe separated throughsaid pas sage, means for concentrating the magneticflux across said working passage in lines diagonal to said passage, anddividers above the diagonal lines of concentration adapted to preventthe magnetic particles from being deflected in approaching said lines ofconcentration.

' 2. The combination in a ma netic separator having a working passage,0" means for es-f tablishing a magnetic rifle diagonally across saidworking passage, and a divider-plate in the path of material approachingthe rifle, adapted to prevent the magnetic particles from beingdeflected in approaching said rifle substantially as and for the purposeset forth.

3. In a magnetic separator, the combination with a series of magneticprojections, of means for dpassing material to be separated across saiprojections, and divider-plates separating the attracted andnon-attracted particles located in the path of material in theapproaches to said projections, whereby the glnetic particles arepermitted to move e y under the influence of the projection in one partof the field, but are prevented from moving in the opposite directionwhere the field has a counter action.-

4. The combination in a magnetic separator having a working passage, ofmagnetic rifles in said working passa e, and a series of by attractedmaterial leaving the rifle upon one side of the divider-plate isprevented from being diverted toward the path of the non-attractedmaterial by'the action ofithe succeeding rifle.

6. In a magnetic separator, the combination with opposing magnet-polesof opposite polarity facing each other to constitute a workin passage,of a series of ridges upon said p0 e'faces to concentrate the magneticflux in lines diagonal to the working passage, the angles of inclinationof said diagonal lines being increased toward the lower end of thepassage: 0 I V 7. a magnetic separator, the combination withmagnet-poles of opposite polarity facing each other to constitutea'workmg assa e, of a series of diagonal magnetic rifles m sai workingpassage, said rifles being located progressively at increasing distancesapart and at progressively greater angles of inclination.

8. The combination in a magnetic separator having a Workin passage, ofdiagonallyinclined magnetic ri es in said working pas; sage, andvertical dividing-plates located above said rifles, said rifles beingspaced at successively greater distances apart and With successivelygreater inclinations toward the lower end of the working passage,substantially as set forth.

9. In a magnetic separator, the combination with ma netpoles of oppositepolarity facing each otfler to constitute a Working passa e, of meansfor establishing a magnetic r' e' dia onally across said passage, and adivider-p ate in the path 0 material approaching said rifle.

10. The combination in a magnetic separator havin a workin passage, ofdiagonal ma netic rifles in sai passage, and a series of ivider-platesbetween the rifles between the paths of the attracted and non-attractedparticles, adapted to revent said attracted particles from being (Iiawninto the path of said other particles.

In witness whereof I hereunto subscribe my name this 13th day of March,A. D. 1905.

HENRY H. WAIT.

Witnessesi IRVING MACDONALD, DE WITT C. TANNER.

